The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 2009
Filed:
Apr. 27, 2007
Shigemitsu Suzuki, Takahama, JP;
Naoto Toma, Kariya, JP;
Takeshi Hashizume, Handa, JP;
Aisin Seiki Kabushiki Kaisha, Kariya-Shi, Aichi-Ken, JP;
Abstract
A valve opening and closing timing control device includes a phase control unit having a drive side rotation member for rotating in synchronization with a crankshaft of an internal combustion engine, a driven side rotation member provided coaxially with the drive side rotation member for rotating in synchronization with a camshaft of the engine and a phase control mechanism for controlling a relative rotational phase between the drive side member and the driven side member by being supplied with an operation fluid. The phase control unit is provided at each set of camshafts of the internal combustion engine having plurality sets of camshafts. The valve timing control device further includes a first pump driven by the internal combustion engine and a second pump driven by a motor, wherein the first pump supplies the operation fluid to all of the phase control units provided at the each set of camshafts and the second pump supplies the operation fluid only to the phase control unit provided at one set of camshaft.